FR2339133A1 - Burner for liquid or gaseous fuel - uses air velocity and swirl to slow combustion and lower peak temp. and minimise nitrous oxides - Google Patents

Burner for liquid or gaseous fuel - uses air velocity and swirl to slow combustion and lower peak temp. and minimise nitrous oxides

Info

Publication number
FR2339133A1
FR2339133A1 FR7702139A FR7702139A FR2339133A1 FR 2339133 A1 FR2339133 A1 FR 2339133A1 FR 7702139 A FR7702139 A FR 7702139A FR 7702139 A FR7702139 A FR 7702139A FR 2339133 A1 FR2339133 A1 FR 2339133A1
Authority
FR
France
Prior art keywords
air
burner
liquid
duct
minimise
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7702139A
Other languages
French (fr)
Other versions
FR2339133B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP51009951A external-priority patent/JPS51101721A/ja
Application filed by Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Publication of FR2339133A1 publication Critical patent/FR2339133A1/en
Application granted granted Critical
Publication of FR2339133B1 publication Critical patent/FR2339133B1/fr
Granted legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C7/00—Combustion apparatus characterised by arrangements for air supply
    • F23C7/002—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion
    • F23C7/004—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion using vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
    • F23D14/24—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other at least one of the fluids being submitted to a swirling motion

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)

Abstract

The burner for liquid or gaseous fuels comprises an axial fuel pipe (1) surrounded for part of its length by a coaxial cylindrical casing (2) closed at one end and containing an air swirler (4) with blades set at between 45 and 75 to the axis. The swirler may be fixed or free to rotate. Air enters the casing at the side and leaves via a flanged conical extension (5) on the furnace front. In this conical portion the flow area is reduced by between 40 and 80%. The swirled air is thus accelerated before it enters the furnace through a cylindrical duct (7). The air exit velocity is between 20 and 60 m/sec and in any case greater than the flame propagation speed with the fuel in question. The end of the fuel pipe should be between 0.1 and 4.0 (pref. 0.5-1.0) air duct dias. upstream of the duct end. In combination these measures slow down the initial combustion rate, flatten the combustion temp. curve and reduce its peak value. This in turn inhibits the formation of oxides of nitrogen.
FR7702139A 1976-01-31 1977-01-26 Burner for liquid or gaseous fuel - uses air velocity and swirl to slow combustion and lower peak temp. and minimise nitrous oxides Granted FR2339133A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP51009951A JPS51101721A (en) 1975-01-31 1976-01-31

Publications (2)

Publication Number Publication Date
FR2339133A1 true FR2339133A1 (en) 1977-08-19
FR2339133B1 FR2339133B1 (en) 1980-09-12

Family

ID=11734270

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7702139A Granted FR2339133A1 (en) 1976-01-31 1977-01-26 Burner for liquid or gaseous fuel - uses air velocity and swirl to slow combustion and lower peak temp. and minimise nitrous oxides

Country Status (1)

Country Link
FR (1) FR2339133A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2452946A1 (en) * 1979-04-02 1980-10-31 Outokumpu Oy IMMERSION TYPE EVAPORATOR

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2452946A1 (en) * 1979-04-02 1980-10-31 Outokumpu Oy IMMERSION TYPE EVAPORATOR

Also Published As

Publication number Publication date
FR2339133B1 (en) 1980-09-12

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